[GRASS5] nviz problem

[Huidae Cho]

Interesting!

Is wish running in background? As I know, a shell-like program cannot be
running in that way because if it's bg'ed or run with "&", /bin/sh or
the login shell takes control of stdin so that users can stay in the login
shell.

If it's executed by a script, then it's ok because it's a usual shell
script.

Do you mean running "nviz" and executing other programs in the "%" nviz
prompt instead of running "nviz &"?

If wish is running in background (wish &), how can you execute wish functions?


Thank you.
Huidae Cho


On Sat, Dec 18, 2004 at 01:22:50PM +0000, Bob Covill wrote:
> 
> Hi,
> 
> 
> 
> It appears that not even wish will run in the background on your system ...
> 
> very strange. 
> 
> 
> 
> The current nviz IS the old NVWISH executable which was called was called by
> 
> the old nviz shell script. The reason I got rid of the shell script was
> 
> because when nviz encountered an error the same un-informitive message was
> 
> generated because it was passed through the script. Also, there are a number
> 
> of error catches in the actual nviz tcl scripts which were completely ignored
> 
> with the old shell startup.
> 
> 
> 
> Before reverting to the old startup it would be nice to know why wish (and
> 
> nviz) will not run in the background on some systems. On both of my RedHat
> 
> systems it runs fine both in the background and the foreground.
> 
> 
> 
> --
> 
> Bob
> 
> 
> 
> On 12/18/2004, "Huidae Cho" <grass4u at gmail.com> wrote:
> 
> 
> 
> >Hi,
> 
> >
> 
> >Now nviz is not a *wish script but a shell itself. That's why it prints
> 
> >a prompt and we cannot execute it background and inside "d.m &". To fix
> 
> >this problem, I think we should go back to NVWISH because running nviz
> 
> >foreground is pain.
> 
> >
> 
> >You can test this:
> 
> >
> 
> >	wish &
> 
> >
> 
> >prints % prompt and just stop!
> 
> >
> 
> >Huidae Cho
> 
> >
> 
> >
> 
> >On Fri, Dec 17, 2004 at 09:02:39PM -0400, Bob Covill wrote:
> 
> >> Hello,
> 
> >>
> 
> >> I tried running the latest version of nviz in the background with
> 
> >> various options and it seems to work fine. The "%" prompt that you see
> 
> >> is perfectly normal. The nviz program is simply a customized version of
> 
> >> the Tcl/Tk "wish" executable. Try executing "wish" on the command line
> 
> >> and you should see the same prompt.
> 
> >>
> 
> >> As for it crashing when it is run in the background, I have no idea. You
> 
> >> might try changing GRASS_MESSAGE_FORMAT environment variable to see if
> 
> >> that has any effect.
> 
> >>
> 
> >> It might help to know what platform and Tcl/Tk version it is failing on.
> 
> >>
> 
> >> For me it works on RedHat 7.3 with Tk8.3, and RedHat 9 with Tk8.4.
> 
> >>
> 
> >> --
> 
> >> Bob
> 
> >>
> 
> >>
> 
> >> Helena wrote:
> 
> >> >Huidae Cho wrote:
> 
> >> >
> 
> >> >>Hi,
> 
> >> >>
> 
> >> >>I noticed today that nviz doesn't work if I run it background as
> 
> before.
> 
> >> >>Similarly, it just stops after displaying a map when it's executed from
> 
> >> >>"d.m &" which is recommended in the welcome message.
> 
> >> >>
> 
> >> >>nviz elevation=dem &    # doesn't work
> 
> >> >>d.m &            # nviz doesn't work
> 
> >> >>
> 
> >> >>nviz elevation=dem    # works!
> 
> >> >>d.m            # nviz works!
> 
> >> >>
> 
> >> >>And I see nviz prints % prompt. Does anyone have a clue?
> 
> >> >
> 
> >> >
> 
> >> >It must be the latest change that was done - I just tried it and it
> 
> >> >does not work even if I do nviz elevation=dem, it displays the DEM
> 
> >> >but fails to open the Main pannel and prints a % prompt.
> 
> >> >It worked OK just a few days (weeks?) ago.
> 
> >> >It may be related to the change in the startup script - Bob, are you
> 
> >> >around? How does it work for you?
> 
> >> >
> 
> >> >Helena
> 
> >> >
> 
> >> >>
> 
> >> >>Thanks.
> 
> >> >>Huidae Cho
> 
> >> >>
> 
> >> >>_______________________________________________
> 
> >> >>grass5 mailing list
> 
> >> >>grass5 at grass.itc.it
> 
> >> >>http://grass.itc.it/mailman/listinfo/grass5
> 
> >> >
> 
> >> >
> 
> >
> 
> >